package com.ssy.mall.exception;

import com.ssy.mall.common.ApiRestResponse;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.slf4j.Logger;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.ArrayList;
import java.util.List;


/*
处理统一异常的的handler
 */
@RestControllerAdvice
public class GlobalExceptionHandler {
    private final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object handleException(Exception e){
        log.error("Default Exception",e);
        return ApiRestResponse.error(SsyMallExceptionEnum.SYSTEM_ERROR);
    }
    @ExceptionHandler(SsyMallException.class)
    @ResponseBody
    public Object handleSsyMallException(SsyMallException e){
        log.error("SsyMallException",e);
        return ApiRestResponse.error(e.getCode(),e.getMessage());
    }
    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseBody
    public ApiRestResponse handleMethodArgumentNotValidException(MethodArgumentNotValidException e){
        log.error("MethodArgumentNotValidException",e);
        return handleBindingResult(e.getBindingResult());
    }
    private ApiRestResponse handleBindingResult(BindingResult result){
        //把异常处理为对外暴露的提示
        List<String> list =new ArrayList<>();
        if (result.hasErrors()) {
            List<ObjectError> allErrors = result.getAllErrors();
            for (ObjectError objectError : allErrors) {
                String message = objectError.getDefaultMessage();
                list.add(message);

            }
        }
        if (list.size() == 0) {
            return ApiRestResponse.error(SsyMallExceptionEnum.REQUEST_PARAM_ERROR);
        }
        return ApiRestResponse.error(SsyMallExceptionEnum.REQUEST_PARAM_ERROR.getCode(), list.toString());
    }

}
